[ 11.109316][ T251] ip (251) used greatest stack depth: 23616 bytes left [ 13.379466][ T304] 8021q: 802.1Q VLAN Support v1.8 [ 18.654870][ T434] br10: port 1(veth1.10) entered blocking state [ 18.655379][ T434] br10: port 1(veth1.10) entered disabled state [ 18.655827][ T434] veth1.10: entered allmulticast mode [ 18.656040][ T434] veth1: entered allmulticast mode [ 18.658105][ T434] veth1.10: entered promiscuous mode [ 18.658344][ T434] veth1: entered promiscuous mode [ 18.780047][ T439] br10: port 2(veth2.10) entered blocking state [ 18.780414][ T439] br10: port 2(veth2.10) entered disabled state [ 18.780728][ T439] veth2.10: entered allmulticast mode [ 18.780937][ T439] veth2: entered allmulticast mode [ 18.783000][ T439] veth2.10: entered promiscuous mode [ 18.783254][ T439] veth2: entered promiscuous mode [ 18.905179][ T444] br10: port 2(veth2.10) entered blocking state [ 18.905725][ T444] br10: port 2(veth2.10) entered forwarding state [ 18.906681][ T444] br10: port 1(veth1.10) entered blocking state [ 18.906987][ T444] br10: port 1(veth1.10) entered forwarding state [ 19.934777][ T480] br11: port 1(veth1.11) entered blocking state [ 19.935071][ T480] br11: port 1(veth1.11) entered disabled state [ 19.935347][ T480] veth1.11: entered allmulticast mode [ 19.938046][ T480] veth1.11: entered promiscuous mode [ 20.065032][ T485] br11: port 2(veth2.11) entered blocking state [ 20.065330][ T485] br11: port 2(veth2.11) entered disabled state [ 20.066569][ T485] veth2.11: entered allmulticast mode [ 20.068607][ T485] veth2.11: entered promiscuous mode [ 20.213995][ T490] br11: port 2(veth2.11) entered blocking state [ 20.214716][ T490] br11: port 2(veth2.11) entered forwarding state [ 20.215216][ T490] br11: port 1(veth1.11) entered blocking state [ 20.215511][ T490] br11: port 1(veth1.11) entered forwarding state [ 21.207074][ T526] br12: port 1(veth1.12) entered blocking state [ 21.207364][ T526] br12: port 1(veth1.12) entered disabled state [ 21.207663][ T526] veth1.12: entered allmulticast mode [ 21.209574][ T526] veth1.12: entered promiscuous mode [ 21.334248][ T531] br12: port 2(veth2.12) entered blocking state [ 21.334564][ T531] br12: port 2(veth2.12) entered disabled state [ 21.334858][ T531] veth2.12: entered allmulticast mode [ 21.336809][ T531] veth2.12: entered promiscuous mode [ 21.444847][ T536] br12: port 2(veth2.12) entered blocking state [ 21.445170][ T536] br12: port 2(veth2.12) entered forwarding state [ 21.445652][ T536] br12: port 1(veth1.12) entered blocking state [ 21.445912][ T536] br12: port 1(veth1.12) entered forwarding state [ 430.575036][ T1967] br12: port 2(veth2.12) entered disabled state [ 430.668054][ T1969] br12: port 1(veth1.12) entered disabled state [ 430.831693][ T1973] veth2.12: left allmulticast mode [ 430.831940][ T1973] veth2.12: left promiscuous mode [ 430.832271][ T1973] br12: port 2(veth2.12) entered disabled state [ 430.942604][ T1975] veth1.12: left allmulticast mode [ 430.942843][ T1975] veth1.12: left promiscuous mode [ 430.943159][ T1975] br12: port 1(veth1.12) entered disabled state [ 431.482585][ T1985] br11: port 2(veth2.11) entered disabled state [ 431.580151][ T1987] br11: port 1(veth1.11) entered disabled state [ 431.757522][ T1991] veth2.11: left allmulticast mode [ 431.757809][ T1991] veth2.11: left promiscuous mode [ 431.758148][ T1991] br11: port 2(veth2.11) entered disabled state [ 431.848267][ T1993] veth1.11: left allmulticast mode [ 431.848522][ T1993] veth1.11: left promiscuous mode [ 431.848837][ T1993] br11: port 1(veth1.11) entered disabled state [ 432.348264][ T2001] veth2: left allmulticast mode [ 432.350036][ T2001] veth2: left promiscuous mode [ 432.352147][ T2001] br10: port 2(veth2.10) entered disabled state [ 432.469243][ T2003] veth1: left allmulticast mode [ 432.469581][ T2003] veth1: left promiscuous mode [ 432.471355][ T2003] br10: port 1(veth1.10) entered disabled state [ 432.654994][ T2007] veth2.10: left allmulticast mode [ 432.655234][ T2007] veth2.10: left promiscuous mode [ 432.655563][ T2007] br10: port 2(veth2.10) entered disabled state [ 432.740873][ T2009] veth1.10: left allmulticast mode [ 432.741131][ T2009] veth1.10: left promiscuous mode [ 432.741470][ T2009] br10: port 1(veth1.10) entered disabled state [ 433.597275][ T2026] [ 433.597510][ T2026] ============================================ [ 433.597702][ T2026] WARNING: possible recursive locking detected [ 433.597882][ T2026] 6.13.0-rc5-virtme #1 Not tainted [ 433.598028][ T2026] -------------------------------------------- [ 433.598204][ T2026] ip/2026 is trying to acquire lock: [ 433.598361][ T2026] ffffffffb6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 433.598681][ T2026] [ 433.598681][ T2026] but task is already holding lock: [ 433.598905][ T2026] ffffffffb6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 433.599209][ T2026] [ 433.599209][ T2026] other info that might help us debug this: [ 433.599427][ T2026] Possible unsafe locking scenario: [ 433.599427][ T2026] [ 433.599646][ T2026] CPU0 [ 433.599762][ T2026] ---- [ 433.599871][ T2026] lock((netdev_chain).rwsem); [ 433.600019][ T2026] lock((netdev_chain).rwsem); [ 433.600165][ T2026] [ 433.600165][ T2026] *** DEADLOCK *** [ 433.600165][ T2026] [ 433.600381][ T2026] May be due to missing lock nesting notation [ 433.600381][ T2026] [ 433.600595][ T2026] 2 locks held by ip/2026: [ 433.600742][ T2026] #0: ffffffffb6fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 433.601031][ T2026] #1: ffffffffb6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 433.601325][ T2026] [ 433.601325][ T2026] stack backtrace: [ 433.601510][ T2026] CPU: 2 UID: 0 PID: 2026 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 433.601731][ T2026] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 433.601925][ T2026] Call Trace: [ 433.602038][ T2026] [ 433.602121][ T2026] dump_stack_lvl+0x82/0xd0 [ 433.602281][ T2026] print_deadlock_bug+0x40a/0x650 [ 433.602433][ T2026] validate_chain+0x5bf/0xae0 [ 433.602585][ T2026] ? __pfx_validate_chain+0x10/0x10 [ 433.602738][ T2026] ? hlock_class+0x4e/0x130 [ 433.602883][ T2026] ? mark_lock+0x38/0x3e0 [ 433.602994][ T2026] __lock_acquire+0xb9a/0x1680 [ 433.603142][ T2026] lock_acquire.part.0+0xeb/0x330 [ 433.603295][ T2026] ? blocking_notifier_call_chain+0x50/0x90 [ 433.603480][ T2026] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 433.603673][ T2026] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 433.603823][ T2026] ? trace_lock_acquire+0x14c/0x1f0 [ 433.603969][ T2026] ? lock_acquire+0x32/0xc0 [ 433.604128][ T2026] ? blocking_notifier_call_chain+0x50/0x90 [ 433.604310][ T2026] down_read+0x9f/0x340 [ 433.604421][ T2026] ? blocking_notifier_call_chain+0x50/0x90 [ 433.604606][ T2026] ? __pfx_down_read+0x10/0x10 [ 433.604754][ T2026] ? __lock_release+0x103/0x460 [ 433.604900][ T2026] ? netconsole_netdev_event+0x2c1/0x620 [ 433.605049][ T2026] ? __pfx___lock_release+0x10/0x10 [ 433.605203][ T2026] blocking_notifier_call_chain+0x50/0x90 [ 433.605349][ T2026] __netdev_upper_dev_unlink+0xd9/0x220 [ 433.605500][ T2026] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 433.605682][ T2026] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 433.605830][ T2026] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 433.606014][ T2026] ? rtnl_is_locked+0x15/0x20 [ 433.606164][ T2026] netdev_upper_dev_unlink+0x71/0xa0 [ 433.606314][ T2026] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 433.606498][ T2026] ? netconsole_netdev_event+0x2c1/0x620 [ 433.606645][ T2026] ? mutex_is_locked+0x1c/0x60 [ 433.606825][ T2026] ? rtnl_is_locked+0x15/0x20 [ 433.606977][ T2026] ? netdev_master_upper_dev_get+0x13/0x120 [ 433.607163][ T2026] vrf_device_event+0x78/0xe0 [vrf] [ 433.607317][ T2026] notifier_call_chain+0xcd/0x150 [ 433.607478][ T2026] blocking_notifier_call_chain+0x66/0x90 [ 433.607630][ T2026] unregister_netdevice_many_notify+0xa7b/0x1580 [ 433.607810][ T2026] ? hlock_class+0x4e/0x130 [ 433.607957][ T2026] ? mark_lock+0x38/0x3e0 [ 433.608067][ T2026] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 433.608249][ T2026] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 433.608441][ T2026] ? kfree+0xf3/0x330 [ 433.608554][ T2026] ? vlan_vid_del+0x310/0x5e0 [ 433.608704][ T2026] ? vlan_vid_del+0x310/0x5e0 [ 433.608849][ T2026] rtnl_dellink+0x348/0xa40 [ 433.608995][ T2026] ? __pfx_rtnl_dellink+0x10/0x10 [ 433.609159][ T2026] ? find_held_lock+0x2c/0x110 [ 433.609305][ T2026] ? __lock_release+0x103/0x460 [ 433.609449][ T2026] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 433.609607][ T2026] ? __pfx___lock_release+0x10/0x10 [ 433.609758][ T2026] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 433.609907][ T2026] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 433.610052][ T2026] ? __pfx_rtnl_dellink+0x10/0x10 [ 433.610201][ T2026] rtnetlink_rcv_msg+0x712/0xc10 [ 433.610348][ T2026] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 433.610496][ T2026] ? hlock_class+0x4e/0x130 [ 433.610651][ T2026] ? mark_lock+0x38/0x3e0 [ 433.610768][ T2026] ? __lock_acquire+0xb9a/0x1680 [ 433.610931][ T2026] netlink_rcv_skb+0x130/0x360 [ 433.611080][ T2026] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 433.611226][ T2026] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 433.611380][ T2026] ? netlink_deliver_tap+0x13e/0x340 [ 433.611534][ T2026] ? netlink_deliver_tap+0xc3/0x340 [ 433.611688][ T2026] netlink_unicast+0x44b/0x710 [ 433.611842][ T2026] ? __pfx_netlink_unicast+0x10/0x10 [ 433.611988][ T2026] ? find_held_lock+0x2c/0x110 [ 433.612137][ T2026] netlink_sendmsg+0x723/0xbe0 [ 433.612289][ T2026] ? __pfx_netlink_sendmsg+0x10/0x10 [ 433.612440][ T2026] ____sys_sendmsg+0x7ac/0xa10 [ 433.612590][ T2026] ? __pfx_____sys_sendmsg+0x10/0x10 [ 433.612739][ T2026] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 433.612941][ T2026] ___sys_sendmsg+0xee/0x170 [ 433.613087][ T2026] ? __pfx____sys_sendmsg+0x10/0x10 [ 433.613239][ T2026] ? kasan_save_stack+0x34/0x50 [ 433.613388][ T2026] ? kasan_save_stack+0x24/0x50 [ 433.613533][ T2026] ? __kasan_record_aux_stack+0x8e/0xa0 [ 433.613685][ T2026] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 433.613873][ T2026] ? __x64_sys_close+0x7c/0xd0 [ 433.614025][ T2026] ? do_syscall_64+0xc1/0x1d0 [ 433.614177][ T2026] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 433.614369][ T2026] ? __lock_acquire+0xb9a/0x1680 [ 433.614520][ T2026] ? find_held_lock+0x2c/0x110 [ 433.614666][ T2026] ? __lock_release+0x103/0x460 [ 433.614818][ T2026] ? __virt_addr_valid+0x22b/0x430 [ 433.614969][ T2026] ? __pfx___lock_release+0x10/0x10 [ 433.615129][ T2026] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 433.615281][ T2026] __sys_sendmsg+0x109/0x1a0 [ 433.615430][ T2026] ? __pfx___sys_sendmsg+0x10/0x10 [ 433.615576][ T2026] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 433.615763][ T2026] do_syscall_64+0xc1/0x1d0 [ 433.615911][ T2026] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 433.616094][ T2026] RIP: 0033:0x7f2eb575a9a7 [ 433.616257][ T2026] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 433.616777][ T2026] RSP: 002b:00007ffeaa5b52e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 433.617005][ T2026] RAX: ffffffffffffffda RBX: 00007ffeaa5b5a10 RCX: 00007f2eb575a9a7 [ 433.617233][ T2026] RDX: 0000000000000000 RSI: 00007ffeaa5b5350 RDI: 0000000000000005 [ 433.617459][ T2026] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 433.617685][ T2026] R10: 00007f2eb5618ef8 R11: 0000000000000246 R12: 0000000000000002 [ 433.617907][ T2026] R13: 0000000067792dbd R14: 0000000000498600 R15: 0000000000000000 [ 433.618138][ T2026]